Ball-mill lining



Oct. 9

BALL MILL LINING ATToRN y Patented oa. e, 1923..

UNIT-ED 'momes n. namur, or DENVER, coronare, AND GUY E. auoenns, or inspraarIoN, aarzoiu, assronons ro mann n. manor, or Los -anennnaicatrronma nenn-MILL LINING.

.Application led November 8, 1921.v Serial No. 513,684.

To all whom z't may concern:

. Be it known that we, THOMAS BH. ASKIN and GUY H. Rincones, citizens of the United States, and respectively residing at Denver, in the county of Denver, State of Colorado, and Inspiration, in the county of Gila and State of Arizona, have invented certain new and useful improvements in Ball-Mill Lininfr, of which the following is a specitication.

his invention relates to liningsfor ball and grinding mills of the type in which GTI wearing plates of iron or steel co-operate with pillow blocks secured to 'the lining platesor to the shell.

The principal object is to decrease the metal consumption per ton of material ground without decreasing the efficiency of the mill, or, otherwise stated,to effect aminimum scrapping of metal by providing wearing plates which wear evenly through to the shell and pillow block at the same time.

We attain this object by providing a lining which consists of pillow blocks and replaceable wearing plates which shroud the pillow blocks and also have a substantial bearingon the shell and which wear evenl and completely through to the pillow bloc and shell so that the pillow block is aorded an indefinite life or becomes, as it were, a permanent fixture, while the wearing plates are constantlyrenewed.

In the drawings forming a part hereof,-

Figure 1 is a fragmentary sectional view illustrating the shell of the mill with a sec-y tion of the improved lining in place.

Fig. 2 is a 'plan view of the pillow block. Fig. .3 is a plan .view ofthe wearing plate.

Fig. 4 is an enlarged detailed section 'through the pillow block and wearing plate. The shell 1is provided as is usual with a lining embodying pillow blocks 2 and wearing plates 3. Each pillow block has its out--l ersurface 4 curved in coincidence with the vance of the heel 7, the remaining length of the pillow block being of substantially uniform thickness. The heel proper of the pillow block is of'materially reduced thickness,

tid

presentin a led e 8 of nearly the full width ofthe pi low b ook, the ends of the ledge coincidin with a recess 9 cut under the heel .of the p1 low block at the respective ends thereof.

Each of the wearing'plates 3 has its lower end position formed on a curvature as at 10 to snu 1y fit the upper curved surface 5 of the pil ow block, the wearing plate meeting the shell 1 immediately in advance of the toe 6 of the pillow block and projecting thence in contact with the shell, as at 11. rlhe wearing plate is of substantiallthickness at 12 where it overlies the pillow block and is then gradually reduced in thickness on a line of regular curvature, as at 13, for the ing inwardly from each end of the 'wearingplate 3, as shown in Fig. 3, and the wearing plate and pillow block are formed with registering openings 18, 19 and 21 respectively to receive a fastening means for securing the pillow block and wearing plate to the shell.

The wearing plates are preferably constructed of. iron or steel and their design is such that they are worn through to the shell and pillow block without' detriment to the latter. 'lhus a re-lining of the mill necessitates the replacement of the wearing plates only, the life of the pillow blocks being indefinite.

Having thus described our invention, we claim 1. A ball or grinding mill lining comprising a plurality of pillow blocks and wearing plates, the wearing plates overlying and protecting the pillow blocks, one edge of said pillow block being recessed at the ends adaptedto receive the extended edges of the adjacent wearing plate.

2. A ball or grinding mill lining consistfro' lll@

ing of units, each unit including a wearing plate. and a pillow block, the latter contacting with the mill shell, and its width being less than, and wholly within that of the wczning ilate. 1 3. A b'all or grinding mill lining consist-ing of over-lapping units, each unit in cluding a wearing plate, and a pillow block, the latter contacting with the mill shell, and its width being less than, and wholly Within that of the wearing plate.

4. A ball or grinding mill lining consisting ot' units, cach unit including a wearing plate. and a pillow block, and means for securing them to each other, the pillow block contacting with the mill shell, and its width being less than, and wholly within that of the wearing plate.

5. A ball or grinding mill lining consist ing ot units, each unit including a wearing plate, and a pillow block, and means for securing them to each other, the pillow block contacting with the mill shell, and its width being less than, and wholly within that of the wearing plate and means extending through the wearing plate and pillow block into the-min Shell for Securiiig the parts together. l

6. A ball or grinding mill lining consistin of units, each unit including a wear?4 7. A ball or grinding mill lining com? prising a shell, a plurality of pillow blocks and waarin" plates, the wearing plates wholly coverlng the pillow blocks and a Substantial area of the shell, in advance of the pillow blocks, one edge of saidipillow blocks being'recessed at the ends adapted to receive the extended edges of said wearin plates, means for connecting said pillow b ock and wearing plates together and means for connecting both to said shell.

In testimony whereof We affix our signatures.

THOMAS B. H. ASKIN. GUY H. RUGGLES. 

